Noun

• S: (n) chestnut (wood of any of various chestnut trees of the genus Castanea)
• S: (n) chestnut, chestnut tree (any of several attractive deciduous trees yellow-brown in autumn; yield a hard wood and edible nuts in a prickly bur)
• S: (n) chestnut (edible nut of any of various chestnut trees of the genus Castanea)
• S: (n) chestnut (the brown color of chestnuts)
• S: (n) chestnut (a small horny callus on the inner surface of a horse's leg)
• S: (n) chestnut (a dark golden-brown or reddish-brown horse)

Adjective

• S: (adj) chestnut ((of hair or feathers) of a golden brown to reddish brown color) "a chestnut horse"; "chestnut hair"